DE3339033C2 - Control device for an instrument that can be attached to a vehicle wheel hub for registering the distance covered by the vehicle - Google Patents

Abstract

A control device for an instrument (10) attached to the hub of a vehicle wheel for registering the distance covered by the vehicle contains a counter with several number wheels (25), a stamping mechanism (29, 30) for stamp cards, means (14) for advancing number wheels the counter as a function of the distance covered, and a pendulum whose axis of oscillation coincides with the wheel axis and which, because it is essentially stationary, causes a relative movement in relation to the recording instrument. This movement is used to drive the means for advancing the number wheels of the counter via a transmission device (12). The means for advancing the dials of the counter includes a feed hook (14) which is permanently deformed when the dials of the counter are blocked and thereby causes a first electrical contact (14b-34) to close. A movable member (18) in the translation device (12) is provided with at least one signal attachment (49) which alternately opens and closes a second electrical contact (33-34) when the transmission device transmits movement. Furthermore, means (34, 35) are arranged for sensing the state of the electrical contacts in order to enable quick determination of whether the registration instrument is operating in the intended manner.

Description

4. Apparatus according to claim 3, characterized in that the contact arm member (31) is pivotably mounted and has a nose (3IaJ which comes to rest against the signal lugs (49) on the planet gear (18) and an arm (31c) which the contact spring (33) is actuated to rest against the contact element (34) when the contact shield element (31) is pivoted from a signal attachment (49). D.

5. Apparatus according to claim 4, characterized in that the nose (3ia) of the contact arm member (31) protrudes through a slot (50) in the ring pinion (17)

6. Apparatus according to claim 4 or 5, characterized in that the contact arm member (31) with a bent part (316J is provided which extends between the nose (31aj and the arm (3Ic ^ and against a movable decoupling arm (40) which rests the nose (3IaJ of the contact member (31) when driving the vehicle from the path of movement of the signal attachments (49) keeps away

7. Apparatus according to claim 6, characterized in that the disengaging arm (40) the contact arm member (31) holds in such a position that the contact spring (33) actuated by the contact arm member (31) against the contact member (34)

8. Apparatus according to claim 6 or 7, characterized in that the disengaging arm (40) is displaceable is mounted and displaceable by an eccentric (39) which is mounted on a rotatable shaft (37) is arranged

9. Apparatus according to claim 8, characterized in that it is provided with a cover plate (36) which is mounted on the rotatable shaft (37) so that the cover plate (36) is between two layers is rotatable, with the parts of the control device protected under the cover plate in one position (driving position) (36) lie, and the disengaging arm (40) the nose (31a,) of the contact arm member (31) of the trajectory of the signal attachment (49) keeps away, and in the second position (control and reading position) the contact sensing members (34,35) and the stamping mechanism (29,30) are exposed as well as the uncoupling arm (40) from the contact arm member (31) is removed

The invention relates to a control device according to the preamble of claim 1.

In such control devices, it is desirable to prevent unauthorized interference in order to influence the To make distance measurement even more difficult or to enable simple and safe control over it, that the control device has not been subjected to any attempts at tampering.

In a control device described and shown in DD-PS 1 25 094, a drive shaft is on the transmission pinions interacting with number wheels are mounted, arranged radially resiliently in such a way that that when the counter is manipulated, the drive axis is displaced radially, causing the counter is taken out of service. The manipulation that took place and the resulting shutdown of the counter can only be recognized indirectly when it is stamped, namely by the fact that certain digits cannot be printed.

This known embodiment has proven itself in practice, but it still is for the following reasons needs improvement. A manipulation that has taken place is then excluded from a later determination, if it succeeds, the drive axis back to its original position Able to push back. Since in the known embodiment, the drive axis between two reboundable Thighs, this does not seem impossible.

In addition, in the known embodiment, manipulation of the translation device can be carried out not notice.

The invention is based on the object of a control device of the type described at the outset so that manipulation of the counter is not possible can be eliminated again and a manipulation of the translation device can be detected can.

This object is achieved by the features contained in the characterizing part of claim 1. In the inventive Design wirii the feed member in a manipulation of the counter in Fc rm one Blocking of the dials permanently deformed, so that this hushed up the manipulation is prevented. In addition, the state of deformation is transmitted to contact members, which is a determination enable manipulation without visual detection of the deformation, d. h, the manipulation can also be determined without dismantling the control device. In addition, the embodiment according to the invention with simple means also the detection of a manipulation of the transmission device, which is also indicated by the contact members and therefore also without one Disassembly of the control device can be determined.

Although it is known from US-PS 36 98 622, in odometers with control devices for determining Payment amounts, taking into account different tariffs, the values determined by contact inquiries retrieved, but this known embodiment is not a generic control device. In addition, the known odometer is a manipulation in the form of a Adjustment of the counter or manipulation in the form of a change in the transmission ratio not detectable. A measurement result changed due to manipulation would rather be taken into account of the selected tariff can be evaluated as a real measurement result.

Advantageous further developments of the invention are described in the subclaims.

One embodiment of an invention in the form of a Control device is described in more detail below with reference to the drawings, with also further advantages are indicated with different individual identifiers of the invention.

F i g. Fig. 1 is a cross-section through the odometer housing with inter alia. Pendulum, translation device, Counter and drive means for the counter.

Fig. 2 shows a feed hook for the feed of the counter.

F i g. 3 shows the advance of the counter.

4 shows the consequence of blocking a Dial in the counter when the counter is advanced.

Fig. 5 shows a contact arm member for controlling the Function of the translation facility.

Figures 6 and 7 show the function of the contact arm member.

The in F i g. The odometer shown in FIG. 1 consists of a housing 10 which is attached to a vehicle wheel will. It encloses a pendulum 11, a step-up device 12, a counter 13 and drive means 14 for the advance of the counter. The pendulum contains a closed space 15 with movable balls 16 and is of the type described in the cited publication. The translation facility consists of a ring pinion 17 with internal teeth, which is rigidly connected to the housing, and two Planet wheels 18, 19 and an eccentric disk 20 located between the planet wheels. The first planet wheel 18 rests on an eccentric 21 firmly connected to the pendulum and engages the teeth of the ring pinion a. The second planet gear 19 also engages in the teeth of the ring pinion and is rotatably supported a center pin 22 designed as an eccentric on the eccentric disk 20. The planet gears and the eccentric disk are stored on a common shaft 23 which is attached to the bottom of the housing 10. On the Eccentric disk 20 has a connecting pin 24 which protrudes into first planetary gear 18 that the first planet gear 18 drives the eccentric disk, which in turn through its center pin 22 the second Fianetenrad 19 drives.

When the vehicle is moving, the pendulum 11 is related to the housing 10 still. The housing rotates with the wheel on which the odometer is attached. the Planet gears 18,19 are caused to rotate, the second planet gear 19 with an in Relation to the ring pinion 17 rotates significantly reduced speed and thereby via a drive pulley 44 and the drive means 14 drives the counter, which will be explained in more detail below.

The translation device is of a known type and its mode of operation is therefore not described here described.

The counter 13 contains several number wheels 25 which are provided with numbers 26 on protruding paragraphs are. Transmission wheels 27 are arranged between the number wheels, around a subsequent number wheel to turn one step further when a previous dial has been rotated one full turn. In the drawing shows only a number wheel and a transmission wheel. The counter is with a toothed one Wheel 28 is provided, which is further rotated step by step with the drive means 14, and that with the number wheel is connected, which when reading the odometer results in the digit with the least significance. Adjacent to the dials is a guide rail 29 for a reading card and a hammer device, which is indicated schematically by the member 30, arranged so that a written registration the position of the counter can be obtained. The counter with the reading device is also from known type and does not form part of the invention.

The control device according to the invention comprises the drive means 14 for advancing the counter and a contact arm member 31, which is pivotably supported on a shaft 32, and a contact spring 33 actuated. The drive means as well as the contact arm member are for cooperation with an electrical one Contact pin 34 is arranged, the tip 35 of which is the connection contact for e'.ri control device. The drive means 14 consists of a feed hook, which is more clearly shown in FIG. 2, and the one with a handle part 14a and a contactor 140 is provided.

The housing 10 is provided with a cover 36 which is fastened on a shaft 37 which is fixed in the housing arranged partition walls 38 and 38a is pivotally mounted. The lid can be rotated so that the Guide rail 29 is exposed for a reading card or stamp card, wherein the shaft 37 is rotated and by means of an eccentric part 39 arranged on the shaft, a disengaging arm 40 for the contact arm member 31 turns. This will be explained in more detail later with reference to Figures 5-7. The case does not rotate on a bracket on a vehicle wheel. Outside the wall 38a is a Sealable clamping ring 10c, which holds the mechanism in the housing 10.

The feed hook shown in Fig.2 consists of an elongated arm 14 which is mounted pivotably about a shaft 42 fixed in the housing 10. The arm 14 is provided with a protruding guide part 14c which has a substantially sector-shaped opening 14c / having. This opening is for receiving a guide pin 43 is provided, which is attached to the drive pulley 44. which lies next to the second planet gear 19 and is driven by this by means of a pin 45 projecting into the planetary gear, as shown in FIG. 1 is shown. The arm 14 is also connected to one end of a snap spring 46, the other end in a Recess in a member 10a superimposed. The links 10a and 106 are two holding profiles arranged in the housing for components and parts.

As the vehicle travels, the second planetary gear 19 causes the drive gear 44 to rotate with the guide pin 43 moving continuously in a circular path. The arm 14 of the feed hook is caused to perform a reciprocating movement, the forward movement in the direction of the arrow being used to rotate the toothed wheel 28 one step. The arm 14 is shown in FIG. 2 is shown in the position that he assumes when he has rotated the toothed wheel one step further and is to be returned in order to advance the toothed wheel one step again. When the guide pin 43 rotates clockwise in the direction of the arrow, the arm 14 is rotated inward in the opposite direction, the snap spring 48 is tensioned and thereby the snap point passes so that the arm remains in its inner position when the guide pin 43 again begins to move to the outer position of the arm 14. During the inward movement of the arm 14, the guide pin thus rests against the rear edge of the opening 14c / in relation to the arm. When the guide pin 43 has moved a little in the direction of the outer position of the arm 14, it comes into contact with the front edge of the opening Hd in relation to the arm 14 and begins to move the arm 14 to its outer position. When the snap point of the spring 46 is passed, the spring changes over to that in FIG. 2 and pushes the arm 14 in a clear working stroke to the outer position, the arm rotating the toothed wheel 28 one step by means of its handle part 14a. This process is repeated continuously as long as the vehicle is moving.

The incremental advance of the toothed wheel 28 is shown in FIG. 3 shown. The handle part of the feed hook 14 is ready to engage a tooth 28a on the toothed wheel 28. When the feed hook is in Moved in the direction of the arrow, the handle moves the tooth 28a so that the toothed wheel is one Step rotates and a new digit 26 is advanced to the registration position. The feed hook will then returned to the position shown in the figure, so that a new feeding process is carried out can be. This is the normal function of the feed hook and the contact fingers 146 of the feed hook does not come into contact with the contact pin 34. The toothed wheel has a backstop 48 provided.

If the toothed wheel 28 or one of the number wheels 25 has been locked to prevent the counter registers the distance covered by the vehicle, the handle part 14a of the feed hook cannot turn the toothed wheel the required step. The handle part is dimensioned so that it is in such a Case is deformed and then does not return to its original shape. So the deformation is permanent, and it has the consequence that the contact finger 146 of the feed hook is bent (downwards in FIG. 3) and thereby comes into contact with the contact pin 34, so that an electrical contact is closed will. This is in FIG. 4 shown. This contact closure can be done during inspection or on-the-fly control easily ascertain through the accessible tip 35 of the contact pin 34, since this contact closure is permanent is.

In order to be able to control the operation of the translation device, the contact arm member is 31 arranged. As already mentioned, it is pivotably mounted on the shaft 32 and is supported by Paragraphs 49 on the first planetary gear 18 are controlled. The control end of the contact arm member is shaped like a sheet and protrudes through a slot 50 into the ring pinion 17. The other end of the contact arm member is actuated the contact spring 33 which, when the contact arm member is pivoted, rests against the contact pin 34 is brought. The function of the contact arm member is clearer from FIGS. 5-7.

In Fig. 5, the contact arm member 31 and the first planet gear 18 provided with lugs 49 are schematic in horizontal elevation, from below in FIG. 1 seen, shown. The contact arm link is at one end with a leaf-shaped nose 31a, which, as mentioned above, through the narrow slot 50 in the Ring pinion 17 protrudes. The nose protrudes into the path of movement for the approaches and is therefore of this is actuated so that the contact arm member is pivoted about the bearing shaft 32. The other end of the Contact arm member is formed with a tail portion 31c which operates one end of the contact spring 33, the when pivoting the contact arm link to the A.r'.Tge against the contact pin 34 is brought, as shown in FIG. 6 is shown. The other end of the contact spring 33 is connected to the housing 10. Since the planet gear 18 is mounted on an eccentric in the middle of the ring pinion rotates, the contact point of the planetary gear with the ring pinion moves around the ring pinion, whereby the planet gear rotates in the opposite direction to the eccentric, as indicated by the arrows When the contact point of the planetary gear with the ring pinion is substantially diametrically in relation to the Nose of the contact member is, the lugs 49 on the nose 31a pass in a path that with Distance to the nose. In this case, the lugs will not actuate the nose and the contact arm member will then of course not turned. By turning the vehicle wheel fitted with the odometer some Turns, you get a contact closure

7th

course that results in a certain signal pattern. This signal pattern can easily be registered by the contact pin 34. The signal pattern depends on the number of approaches on the planetary gear 18 and the transmission ratio between the ring pinion 17 and the planetary gear, ie on the number of teeth on the ring pinion and the planetary gear. By reading the signal pattern, it is thus possible to determine If cht whether the translation device is operating in the intended manner.

In FIGS. 5-7, the disengaging arm 40, which is only indicated schematically in FIG. 1, is shown in greater detail. This disengaging arm is displaced in its longitudinal direction by the eccentric 39, which engages in a recess 40a in the disengaging arm. The _{disengagement:} ■■] clutch arm is moved to rest against a projecting edge 3Ii) on the contact arm member when ■: ', the cover 36 on the housing is rotated to the closed position ■'). As a result, the nose 31a of the contact ring is displaced away from the movement tracks of the lugs 49, and the contact spring 33 is brought to bear against the contact pin 34. This is in FIG. 7 and has several advantages. First, the contact and contact arm member need not operate during normal driving of the vehicle. Second, the pendulum is not burdened with the work that is required for the pivoting movement of the contact arm member, but the work of the: Pendulum can be fully used to drive the counter. Third is the electrical contact

closed during the running of the vehicle overall ^30:;

hold:., whereby the contact surfaces are protected from oxidation and contamination, so that the contact surfaces are not worn and clean when the inspection is carried out.

Even if only one embodiment of the control device according to the invention has been described and shown, it is obvious that many variations ⁵ T! and modifications are conceivable. The handle and con- i; clock parts of the feed hook can, for. B. in another 40 'manner, and the contact arm member:; can be controlled by signal approaches which are arranged on another movable member in the translation device. Contact closure can also take place on two different contact pins and, if necessary, be indicated by means of light-emitting diodes. Cj

For this purpose 3 sheets of drawings

50

60

Claims (3)

Patent claims: 1. Control device for an instrument that can be fastened to a vehicle wheel hub for registering the distance covered by the vehicle, which has a counter with several number wheels, a stamping mechanism for stamp cards, a means for advancing the number wheels of the counter as a function of the distance traveled and a pendulum whose The axis of oscillation coincides with the vehicle wheel axis and which, because it is essentially stationary, causes a relative movement in relation to the registration instrument, and uses the relative movement to drive the means for advancing the number wheels of the counter via a transmission device, the means for advancing the number wheels of the counter has a feed member with an engaging part which engages the teeth of a wheel, characterized in that the feed member (14) is permanently deformed when the number wheels (25) are blocked so that the feed member (14) is in contact ktteil (\ 4b) , which is displaced to rest against a contact member (34) when the feed member (14) is deformed, and that a movable member (18) is present in the translation device (12) which is provided with at least one signal attachment (49 ) is provided, which alternately opens and closes a second electrical contact (33, 34) when the transmission device (1 °.) is transmitted, and means (34, 35) are arranged for checking the state of the electrical contacts. 2. Control device according to claim 1, characterized in that the feed member (14) consists of an arm, the engagement part (Ha) is formed by a hook-shaped bend of the arm and the contact part (14ty by a finger protruding from the engagement part (14a) is formed is. 3. Apparatus according to claim 1, characterized in that the translation device (12) is a Ring pinion (17) with internally arranged teeth, also a first planet gear (18), which is on a with the pendulum (11) firmly connected eccentric (21) is mounted and engages in the ring pinion (17), and has a second planet gear (19) which also engages in the ring pinion (17) and on a as Eccentric center pin (22) between the two planet gears (18, 19) Eccentric disc (20) is rotatably mounted that the planet gears (18, 19) and the eccentric disc (20) are mounted around a common shaft (23) that between the first planet gear (18) and the eccentric disc (20) a connecting pin (24) is arranged so that when driving the vehicle first planet gear (18) drives the eccentric disk (20) that the eccentric disk (20) in turn the second planet gear (19) drives that the second planet gear (19) the feed means (44, 14) the counter drives at reduced speed, and that the first planetary gear (18) along its periphery is provided with several signal lugs (49) which are connected to a movable contact arm member (31) work together so that the Konlaktarm member (31) h5 when it rests against a signal attachment (49), it is moved by this to a position in which there is a contact spring (33) to rest against the contact member (34) actuated